This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 7 |
| 3 | 41 |
| 4 | 343 |
| 5 | 3497 |
| 6 | 42583 |
| 7 | 602537 |
| 8 | 9719383 |
| 9 | 176075177 |
| 10 | 3539816023 |
| 11 | 78209790377 |
| 12 | 1883780763223 |
| 13 | 49127973630377 |
| 14 | 1379201149390423 |
| 15 | 41470672541233577 |
| 16 | 329725285558734423 |
| 17 | 45290937289840177577 |
| 18 | 1633052915424520654423 |
| 19 | 62144013487721190961577 |